Drum Trap with vent.

DMD1960 · May 8, 2019

Usual story. Circa 1960 house with drum traps for tubs. Have found articles and videos on replacement with p-trap but unable to find anything relating to when there is a third connection going to a vent.
Also, this appears to be lead. Does that complicate things ?

Thank you.

frodo · May 8, 2019

The vent will transition to a galvanized pipe in the wall
you will need to cut the sheet rock behind the tub wall and remove the lead pipe
tie onto the galvanized pipe
cut the wall in the room behind the tub.

DMD1960 · May 8, 2019

frodo said:
The vent will transition to a galvanized pipe in the wall
you will need to cut the sheet rock behind the tub wall and remove the lead pipe
tie onto the galvanized pipe
cut the wall in the room behind the tub.

View attachment 20749

That looks like the setup. How do I tie the vent pipe back into the P-trap after I take the drum out ?

frodo · May 9, 2019

remove the drum trap and the lead pipe
back to what ever it ties into, that is not pictured
tie onto that with a fernco proflex band
and repipe it with pvc

post picture where led ties into the cast iron

DMD1960 · May 9, 2019

Can't see it very well but, it looks like the vent pipe goes up about a foot before joining a different pipe.
The drain runs to a bigger lead looking pipe, that I assume is under the toilet, which attaches to an , I assume, cast iron main outlet. Is all of the dark grey lead ?

One problem is that the tub wall backs to another bathroom with a full vanity in the way .